If you build OBS from source and would like more than a 3-band equalizer without a plugin, I've still got my eq8 branch getting stale here:

https://github.com/phkahler/obs-studio/tree/eq8

I should rebase that...

BTW they do not want it upstream for whatever reasons. I'm not complaining, I get it. But some of us like this built-in so I'm keeping it around.